Step 2: Disassemble the front of the ATC2K
Those days will be gone now.
then take a sturdy screwdriver and pry loose the frontal rubber cap of the ATC2K by stabbing between and under the side of the rubber cap.
the cap was only attached to the rim in my case. stay away from the center of the cap.
when the rubber cap is removed you'll see a round plate with the square cam window.
it is fixed in place with three phillips screws. unscrew and remove the plate.
now the glass in front of the actual cam is exposed. it is lying in a rubber cup.
turn the cam upside down and gently let the glass and the cup fall out.
Keep these clean! The rubber cup is what makes the watertight seal. damage or debris
will cause leaks.